正式なコメント
First, you don't need to use the internal mixer in rekordbox, you have it configured for external use.
Second you don't have the audio outputs configured properly. Output deck 1 should be on CH1, and deck 2 should be CH2.
In order to configure it to record in other software, you'll need to assign the inputs to 5/6 as those are the only ones set to the REC. If you want, you can reconfigure it for 1/2 to be REC, which may be needed as some applications don't support ASIO.



